Dear List,
I was wondering if there is a simple way to solve (equate) two functions in
R. For example:
(1) 5x + 3y = 30
(2) 12x - 2y = 26
I would like R to finde x = 3 and y = 5
Is there an implemented function in R or would I have to write an own
function?
Thank you very much for your help.
Dear List,
I know this is not the first post on this topic, but I need basic help I
guess. Assuming the simple case of two lines with one intercept, how can I
make R calculate this intercept, NOT using locator().
par (xaxs="i", yaxs="i")
plot( 1, bty="n" ,xlim=c(0,300) , ylim=c(0,300) , xlab="X",
Thank you Jorge, this did get me started and who else might be interested in
the topic, a possible code could be something like:
# Define the functions
f1 <- function(x) 100-0.5*x
f2 <- function(x) 150- x
# Plot the functions
par (xaxs="i", yaxs="i")
plot(
Dear list,
I get the ifelse function to work on a data frame but don't know how to do
something similar (only more conditions) with the combination of if and else
like in the example:
A <- c("a","a","b","b","c","c")
B <- c(rep(2,6))
dat <- data.frame(A,B)
dat$C <- if(AB$A=="a") {AB$B^2} else
Your code did not run on my computer, however the "atop" function should do
what you are looking for I guess. This is more or less your axis, only
changed a bit in your formula, think it looks better this way:
e.g.
par(mar=c(5,7,.5,.5), las=1, adj=.5, cex.lab=1.5)
plot(1, type="n"
, xlab="Wee
Dear list,
I am looking for a possibility to present results in a more graphical way by
adding an axis. But I have trouble relating my data to the added axis.
Imagine the following example:
a <- c(10, 20, 30, 40)
b <- c(50, 250, 500, 600)
ba <- b/a
par(las=1, mar=c(5,5,.5,5))
plot(a,b, type
Hi Jim, hi John,
thank you very much for your tips. The "plotrix" package solves the problem!
However, thank you also for the advice that my way of plotting the data
might not be the best. I will think about it.
So once again thanx !
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Dear users,
I want to transfer a list of results from R to some practical format, from
where I can continue manipulating, copying,... the values, e.g. :
list1 <- list("My first list", matrix(1:6, ncol=3), c(1,2,3,4,5,6) )
# Imagining I forgot something and want to add it to the list like:
list1[[4
If you use simple barplot graphic try this, e.g.:
a<-barplot(some.data)
text(a, some.data, some.data)
The "text" command needs x and y coordinates, by assigning your barplot to
"a" (here), you have the x coordinats and by using the y-values of the
barplot, the values will be written ontop of the
Thanx for your effort answering by phone!
dput (list, "list.txt") does write something to a text doc but in a
confusing manner. All previous commands that created the list seem to
appear. However, I will check out the pack you mentioned.
Guess my aim would be to read the list into a simple .txt f
Yup, “rapply“ does the magic. Thank you very much, this command is new to me!
My “glaringly obvious error” is indeed very obvious and was a result of
constructing an example here and copying my “lapply” command into the text.
So don't worry, when the question arose both names were identical
Once
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